5-Ethylisoxazole-3-carbohydrazide CAS 707536-50-3
| CAS No. | 707536-50-3 |
| Molecular Formula | C6H9N3O2 |
| Molecular Weight | 155.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 155.15 g/mol gives 5-Ethylisoxazole-3-carbohydrazide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Ethylisoxazole-3-carbohydrazide (CAS 707536-50-3), molecular formula C6H9N3O2 and molecular weight 155.15 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 5-Ethylisoxazole-3-carbohydrazide is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 155.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-Ethylisoxazole-3-carbohydrazide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C6H9N3O2 |
| Molecular Weight | 155.15 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 3 |
Related Ethylisoxazole Standards
- Methyl 3-Ethylisoxazole-4-carboxylate (CAS 1402812-89-8)
- Methyl 3-ethylisoxazole-5-carboxylate (CAS 910321-87-8)
- Methyl 5-ethylisoxazole-4-carboxylate (CAS 954229-90-4)
- 3-Ethylisoxazole-5-carbonyl chloride (CAS 80173-67-7)
- 5-Ethylisoxazole-4-carbonyl chloride (CAS 99803-82-4)
- Ethyl 5-ethylisoxazole-4-carboxylate (CAS 134540-94-6)
- 3-Ethylisoxazole-5-carboxylic acid (CAS 14633-21-7)
- 4-Ethylisoxazole-5-carboxylic acid (CAS 1518161-26-6)
Recommended Standards
- 5-Ethyl-3-methyl-1,2-oxazole-4-carboxylic acid (CAS 69083-54-1)
- 5-Hydroxy-2-(hydroxymethyl)-1-methylpyridin-4(1H)-one (CAS 70033-59-9)
- 5-Ethyl-1-methyl-2-nitro-1H-imidazole (CAS 23406-67-9)
- 5-Hydroxy-N,1-dimethyl-1H-imidazole-4-carboxamide (CAS 67218-65-9)
- N-(4-amino-1-methyl-6-oxo-1,6-dihydropyrimidin-5-yl)formamide (CAS 64194-59-8)
- EN 6 (CAS 1808714-73-9)
- [4,4'-Bipyridine] 1-oxide (CAS 39182-30-4)
- 4-Cyclopropoxy-2-iodo-5-methoxypyridine (CAS 1243357-14-3)
- Methyl 2-(4,4-dimethyl-5-oxo-4,5-dihydrooxazol-2-yl)benzoate (CAS 176234-09-6)
- 1,3-Benzenedicarboxylicacid,5-[2-(2-methoxyethoxy)ethoxy]- (CAS 959852-02-9)
- (1S,2R,4S,5R)-2-((S)-Hydroxy(6-hydroxyquinolin-4-yl)methyl)-1-(2-oxo-2-(tritylamino)ethyl)-5-vinylquinuclidin-1-ium bromide (CAS 2937392-21-5)
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- 8-Methylnonyl diphenyl phosphite (CAS 26544-23-0)
- [D-His]-Semaglutide B (x TFA Salt) (CAS CATO-C4X-2226117)
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